JP2000286915A - Signal modulation circuit and method - Google Patents

Signal modulation circuit and method

Info

Publication number
JP2000286915A
JP2000286915A JP11091717A JP9171799A JP2000286915A JP 2000286915 A JP2000286915 A JP 2000286915A JP 11091717 A JP11091717 A JP 11091717A JP 9171799 A JP9171799 A JP 9171799A JP 2000286915 A JP2000286915 A JP 2000286915A
Authority
JP
Japan
Prior art keywords
signal
outputting
analog
received
amplitude component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11091717A
Other languages
Japanese (ja)
Inventor
Hiroaki Shimizu
博明 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP11091717A priority Critical patent/JP2000286915A/en
Priority to EP00913062A priority patent/EP1170915A4/en
Priority to PCT/JP2000/002124 priority patent/WO2000059172A1/en
Publication of JP2000286915A publication Critical patent/JP2000286915A/en
Priority to US09/964,758 priority patent/US6914943B2/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/361—Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a modulation circuit and a modulation method for outputting an RF(radio frequency) signal having decreased out-band noises even to a modulation signal including its amplitude change. SOLUTION: This modulation circuit includes a phase signal/amplitude component generation part 1 which extracts a phase signal and an amplitude component in response to a given modulation signal, the analog conversion parts 3 and 4 which convert the phase signals into analog signals, a quadrature modulator 5 which outputs an IF(intermediate frequency) signal by applying the quadrature modulation to the analog signal, a frequency converter 7 which applies the frequency conversion to the IF signal and outputs an RF signal, a delay circuit 23 which delays the said amplitude component by a prescribed time to output an amplitude component signal and a variable gain part 9 which varies the amplitude of the RF signal received from the converter 7 according to the amplitude component signal and outputs the varied RF signal. Thus, it is possible to obtain a modulated signal having decreased out-band noises even to a modulated signal including an amplitude component by the function of the part 9.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、信号変調方式であ
って、変調信号から抽出した位相信号と振幅成分に基づ
いて信号変調を行う信号変調方式に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal modulation system for performing signal modulation based on a phase signal and an amplitude component extracted from a modulation signal.

【０００２】[0002]

【従来の技術】従来の変調回路及び変調方法として、"A
n Up-Conversion Loop Transmitter IC for Digital Mo
bile Telephones" (Siemens Microelectronics/1998 IE
EE ISSCC SP 23.1)に示されたものがある。図９は、従
来のこの種の変調回路の回路図であって、この文献に示
された変調方式の本発明に係わる基本ブロックを抜き出
したものである。以下、この図を用いて、従来装置の動
作を説明する。この装置は、ＧＭＳＫ変調などの位相変
調（ＰＳＫ）信号を発生されることが可能である。2. Description of the Related Art As a conventional modulation circuit and modulation method, "A
n Up-Conversion Loop Transmitter IC for Digital Mo
bile Telephones "(Siemens Microelectronics / 1998 IE
EE ISSCC SP 23.1). FIG. 9 is a circuit diagram of a conventional modulation circuit of this type, in which the basic blocks according to the present invention of the modulation system disclosed in this document are extracted. Hereinafter, the operation of the conventional apparatus will be described with reference to FIG. The device is capable of generating a phase modulated (PSK) signal, such as a GMSK modulation.

【０００３】図９において、この変調回路は、ベースバ
ンド信号が与えられる位相信号生成部８１と、デジタル
／アナログ（Ｄ／Ａ）変換器３、４と、直交変調器５
と、中間周波数（ＩＦ）シンセサイザ６とを有してお
り、ここで直交変調器５は、乗算器５１、５２と、位相
移相器５３、５４と、乗算器５１、５２と、加算器５５
とを有している。更に位相同期変調ループ７と、無線周
波数（ＲＦ）シンセサイザ８と、電力増幅器９とを有し
ており、ここで、位相同期変調ループ７は、ローパスフ
ィルタ７１と、Ｍ分周器７２と、ダウンコンバータミキ
サ７３と、ローパスフィルタ７４と、Ｎ分周器７５と、
周波数位相比較器ＰＦＤ７６と、ループフィルタ７７
と、電圧制御発振器７８とを有している。更に、Ｄ／Ａ
変換器１０が電力増幅器９に接続されている。In FIG. 9, a modulation circuit includes a phase signal generator 81 to which a baseband signal is applied, digital / analog (D / A) converters 3 and 4, and a quadrature modulator 5
And an intermediate frequency (IF) synthesizer 6, where the quadrature modulator 5 includes multipliers 51 and 52, phase shifters 53 and 54, multipliers 51 and 52, and an adder 55.
And It further includes a phase locked modulation loop 7, a radio frequency (RF) synthesizer 8, and a power amplifier 9, where the phase locked modulation loop 7 includes a low-pass filter 71, an M frequency divider 72, A converter mixer 73, a low-pass filter 74, an N frequency divider 75,
Frequency phase comparator PFD 76 and loop filter 77
And a voltage-controlled oscillator 78. Furthermore, D / A
Converter 10 is connected to power amplifier 9.

【０００４】このような構成において、以下に動作説明
を行う。ベースバンドデジタル変調信号が与えられる位
相信号生成部８１から位相信号Ｉ、Ｏがデジタル／アナ
ログ（Ｄ／Ａ）変換器３、４に入力される。デジタル／
アナログ（Ｄ／Ａ）変換器３、４において、位相信号生
成部８１から入力されたデジタルベースバンド信号をア
ナログ信号に変換する。デジタル／アナログ（Ｄ／Ａ）
変換器３、４の出力は直交変調器５で中間周波数（Ｉ
Ｆ）シンセサイザ６の出力信号と乗算されることによ
り、ＩＦ信号へ周波数変換される。ＩＦシンセサイザ６
の出力信号とデジタル／アナログ（Ｄ／Ａ）変換器３、
４の出力信号とを乗算する際に、Ｄ／Ａ変換器３の出力
に掛けるＩＦシンセサイザ６出力の信号位相と、デジタ
ル／アナログ（Ｄ／Ａ）変換器４の出力に掛けるＩＦシ
ンセサイザ６の出力の信号位相とを９０度（π／２［ｒ
ａｄ］）異ならせ、乗算器５１、５２出力を加算するこ
とにより、直交変調器５の出力には直交変調されたＩＦ
信号が得られる。位相移相器５３は、、ＩＦシンセサイ
ザ６の出力信号移相を４５度（π／４［ｒａｄ］）遅れ
させ、位相移相器５４はＩＦシンセサイザ６の出力信号
を４５度（π／４［ｒａｄ］）進めさせて、それぞれ、
乗算器５１、５２にローカルとして供給する。これによ
り、乗算器５１に入力されるローカル信号と乗算器５２
に入力されるローカル信号の位相差は９０度（π／２
［ｒａｄ］）となる。乗算器５１、５２の出力を加算器
５５で加算して、直交変調ＩＦ信号を得る。The operation of such a configuration will be described below. The phase signals I and O are input to the digital / analog (D / A) converters 3 and 4 from the phase signal generator 81 to which the baseband digital modulation signal is applied. Digital/
The analog (D / A) converters 3 and 4 convert the digital baseband signal input from the phase signal generator 81 into an analog signal. Digital / Analog (D / A)
The outputs of the converters 3 and 4 are output to an intermediate frequency (I
F) The frequency is converted to an IF signal by multiplying the output signal of the synthesizer 6. IF synthesizer 6
Output signal and digital / analog (D / A) converter 3,
4, the signal phase of the output of the IF synthesizer 6 applied to the output of the D / A converter 3, and the output of the IF synthesizer 6 applied to the output of the digital / analog (D / A) converter 4. Is 90 degrees (π / 2 [r
ad]) and the outputs of the quadrature modulator 5 are added to the outputs of the quadrature modulator 5 by adding the outputs of the multipliers 51 and 52.
A signal is obtained. The phase shifter 53 delays the phase shift of the output signal of the IF synthesizer 6 by 45 degrees (π / 4 [rad]), and the phase shifter 54 shifts the output signal of the IF synthesizer 6 by 45 degrees (π / 4 [rad]). rad])
It is supplied to multipliers 51 and 52 as local. Thereby, the local signal input to the multiplier 51 and the multiplier 52
Is 90 degrees (π / 2)
[Rad]). The outputs of the multipliers 51 and 52 are added by an adder 55 to obtain a quadrature modulated IF signal.

【０００５】位相同期変調ループ７は、無線周波数（Ｒ
Ｆ）シンセサイザ８をローカル信号として用い、直交変
調器５で得られたＩＦ信号を所望の搬送波周波数へ周波
数変換するように動作する。ローパスフィルタ７１で、
直交変調器５の出力のＩＦ信号に含まれる高調波成分を
除去し、Ｍ分周器７２に入力する。ダウンコンバータミ
キサ７３は、後述の電圧制御発振器７８の被変調無線周
波数信号をＲＦシンセサイザ８のローカル信号と乗算し
て、周波数変換するものである。ローパスフィルタ７４
は、ミキサ７３出力に含まれるイメージ信号やスプリア
ス信号を除去するものである。Ｎ分周器７５は、出力信
号７４をＮ分周する。比較器ＰＦＤ７６は周波数位相比
較器で、Ｍ分周器７２の出力信号とＮ分周器７５の出力
信号の周波数および位相を比較し、その結果に応じた信
号を出力するものである。ループフィルタ７７はＰＦＤ
７６出力を平滑化するとともに、この「位相同期変調ル
ープ」の特性を決めるループフィルタである。電圧制御
発振器７８は電圧制御発振器で、入力される制御電圧に
応じて発振する周波数が変わる。The phase-locked modulation loop 7 has a radio frequency (R
F) Using the synthesizer 8 as a local signal, operate to convert the IF signal obtained by the quadrature modulator 5 to a desired carrier frequency. In the low-pass filter 71,
The harmonic component contained in the IF signal output from the quadrature modulator 5 is removed, and the signal is input to the M frequency divider 72. The down-converter mixer 73 performs frequency conversion by multiplying a modulated radio frequency signal of a voltage-controlled oscillator 78 described later by a local signal of the RF synthesizer 8. Low-pass filter 74
Removes an image signal and a spurious signal included in the output of the mixer 73. The N divider 75 divides the output signal 74 by N. The comparator PFD 76 is a frequency / phase comparator that compares the frequency and phase of the output signal of the M frequency divider 72 and the output signal of the N frequency divider 75, and outputs a signal according to the result. Loop filter 77 is PFD
76 is a loop filter that smoothes the output and determines the characteristics of the “phase synchronous modulation loop”. The voltage controlled oscillator 78 is a voltage controlled oscillator, and the oscillation frequency changes according to the input control voltage.

【０００６】ＰＦＤ７６が出力する信号極性やその特性
は様々考えられるが、ここでは、例えば、Ｍ分周器７２
出力の周波数が分周器７５の出力周波数より高く、ある
いは、Ｍ分周器７２出力の位相が分周器７５の出力の位
相よりも進んでいる時に、正のパルス電流を出力し、そ
の差が大きいほど、パルス幅が広くなるように動作する
ものとする。ループフィルタ７７でＰＦＤ７６出力のパ
ルス電流を平滑化し、パルス幅に応じた電圧を得る。電
圧制御発振器７８の制御極性は、ここでは、入力電圧値
が高いほど、周波数も発振周波数も高くなるものとして
説明する。つまり、Ｍ分周器７２出力位相が分周器７５
の出力位相よりも進んでいる場合、電圧制御発振器７８
の位相は進むように制御される。いま、ＲＦシンセサイ
ザ８の周波数を搬送周波数の下側に設定するものとする
と、電圧制御発振器７８の位相が、進んでいるほど、ダ
ウンコンバートされた信号位相も進む。よって、それを
Ｎ分周したＮ分周器７５の出力信号の位相も進む。ま
た、分周器７５の出力の方がＭ分周器７２出力位相より
も進むと、このループは電圧制御発振器７８の発振位相
を遅らせるように動作する。つまり、この「位相同期変
調ループ」は、直交変調器５出力のＩＦ信号位相に追従
して、電圧制御発振器７８の位相が変わるように動作す
る。この時、電圧制御発振器７８の搬送波周波数ｆ
carrierは、次ようになる。[0006] The polarity of the signal output from the PFD 76 and its characteristics can be considered variously, but here, for example, the M frequency divider 72 is used.
When the output frequency is higher than the output frequency of the frequency divider 75 or the phase of the output of the M frequency divider 72 is ahead of the phase of the output of the frequency divider 75, a positive pulse current is output, and Is larger, the pulse width becomes wider. The pulse current output from the PFD 76 is smoothed by the loop filter 77 to obtain a voltage corresponding to the pulse width. Here, the control polarity of the voltage controlled oscillator 78 will be described on the assumption that the higher the input voltage value, the higher the frequency and the oscillation frequency. That is, the output phase of the M divider 72 is
, The voltage-controlled oscillator 78
Is controlled to advance. Now, assuming that the frequency of the RF synthesizer 8 is set below the carrier frequency, as the phase of the voltage controlled oscillator 78 advances, the phase of the down-converted signal also advances. Therefore, the phase of the output signal of the N frequency divider 75 obtained by dividing the frequency by N also advances. When the output of the frequency divider 75 advances more than the output phase of the M frequency divider 72, this loop operates to delay the oscillation phase of the voltage controlled oscillator 78. In other words, this “phase-locked modulation loop” operates so that the phase of the voltage controlled oscillator 78 changes following the IF signal phase of the output of the quadrature modulator 5. At this time, the carrier frequency f of the voltage controlled oscillator 78
carrier is as follows.

【０００７】 （ｆcarrier−ｆlocal）／Ｎ ＝ ｆIF／Ｎ ｆcarrier ＝（Ｎ／Ｍ）ｆIF＋ｆlocal ここで、ｆlocalはＲＦシンセサイザ８の発振周波数、
ｆIFはＩＦシンセサイザ６の発振周波数、Ｍは分周器７
２の分周数、Ｎは分周器７５の分周数である。ＲＦシン
セサイザ８の周波数ｆlocalをチャネルにより可変する
ことにより、各チャネルの搬送波に位相変調を施すこと
ができる。(F carrier −f local ) / N = f IF / N f carrier = (N / M) f IF + f local where f local is the oscillation frequency of the RF synthesizer 8,
f IF is the oscillation frequency of the IF synthesizer 6 and M is the frequency divider 7
The dividing number of 2 and N is the dividing number of the divider 75. By varying the frequency f local of the RF synthesizer 8 depending on the channel, it is possible to perform phase modulation on the carrier of each channel.

【０００８】ここで、電力増幅器９は、位相同期変調ル
ープ７の出力信号を増幅して規定の出力電力まで増幅す
るものである。電力増幅器９は、図示していない制御部
からその出力電力を制御される。デジタル電力制御信号
はＤ／Ａ変換器１０で電圧信号に変換され、その電圧で
電力増幅器９の利得を制御するものである。Here, the power amplifier 9 amplifies the output signal of the phase-locked modulation loop 7 and amplifies it to a specified output power. The output power of the power amplifier 9 is controlled by a control unit (not shown). The digital power control signal is converted into a voltage signal by the D / A converter 10, and the voltage controls the gain of the power amplifier 9.

【０００９】このように、図９に示す信号変調方式は、
周波数的に閉ループを構成しているので、ループ利得を
充分にとれば、周波数誤差や不要なスプリアス輻射が少
なく、良好な変調スペクトラム特性を得ることができ
る。しかし、電圧制御発振器７８の振幅は、原理上、常
に一定であるので、この変調方式は、振幅成分の変動を
伴わないＧＭＳＫのような変調方式にしか適応できな
い。As described above, the signal modulation method shown in FIG.
Since a closed loop is constructed in terms of frequency, if a sufficient loop gain is obtained, a frequency error and unnecessary spurious radiation are reduced, and a good modulation spectrum characteristic can be obtained. However, since the amplitude of the voltage controlled oscillator 78 is always constant in principle, this modulation method can be applied only to a modulation method such as GMSK that does not involve fluctuation of the amplitude component.

【００１０】図１１にＧＭＳＫのベースバンドＩ、Ｑ信
号の時間軸波形の例を示す。この図では、横軸はシンボ
ルレートで正規化してある。また、図１２は、図１１に
示す波形を振幅成分と位相成分に分けて表示したもので
あり、図１３は、ベクトル平面上に表示したものであ
る。FIG. 11 shows an example of a time axis waveform of the GMSK baseband I and Q signals. In this figure, the horizontal axis is normalized by the symbol rate. FIG. 12 shows the waveform shown in FIG. 11 divided into an amplitude component and a phase component, and FIG. 13 shows the waveform shown on a vector plane.

【００１１】図１２を見ると、ＧＭＳＫ信号の振幅成分
は常に一定であることが分かる。また、図１３を見て
も、そのベクトル奇跡は常に定円上にあることからも振
幅が一定であることがわかる。FIG. 12 shows that the amplitude component of the GMSK signal is always constant. Also, from FIG. 13, it can be seen that the amplitude is constant because the vector miracle is always on a constant circle.

【００１２】一方、図１４にπ／４ｓｈｉｆｔ ＱＰＳ
ＫのベースバンドＩ、Ｑ信号の時間軸波形の例を示す。
この図も、横軸はシンポルレートで正規化してある。図
１５は、図１４に示す波形の振幅、位相成分に分けて表
示したものである。図１６は、図１４に示す波形をベク
トル平面上に表示したものである。On the other hand, FIG. 14 shows a π / 4 shift QPS.
5 shows an example of a time axis waveform of K baseband I and Q signals.
Also in this figure, the horizontal axis is normalized by the symbol rate. FIG. 15 shows the amplitude and phase components of the waveform shown in FIG. 14 separately. FIG. 16 shows the waveform shown in FIG. 14 on a vector plane.

【００１３】図１５を見てわかるように、π／４ｓｈｉ
ｆｔ ＱＰＳＫ信号の振幅成分は、コンスタレーション
点に対して−８［ｄＢ］から＋２［ｄＢ］程度の振幅変
動が含まれることがわかる。また、図１６を見ても、そ
のベクトル奇跡は、定円上ではなく、振幅が時々刻々と
変わっている様子がわかる。As can be seen from FIG. 15, π / 4shi
It can be seen that the amplitude component of the ft QPSK signal includes an amplitude fluctuation of about -8 [dB] to +2 [dB] with respect to the constellation point. Also in FIG. 16, it can be seen that the vector miracle is not on a fixed circle but the amplitude is changing every moment.

【００１４】π／４ｓｈｉｆｔ ＱＰＳＫのような変調
信号方式には、図９の構成が適応できない。The configuration shown in FIG. 9 cannot be applied to a modulation signal system such as π / 4 shift QPSK.

【００１５】そこで、振幅成分の変動を伴うような変調
方式、例えばπ／４ｓｈｉｆｔ ＱＰＳＫなどに対応す
るためには、図１０に示すような構成が必要となってく
る。Therefore, in order to cope with a modulation method involving fluctuation of the amplitude component, for example, π / 4 shift QPSK, a configuration as shown in FIG. 10 is required.

【００１６】図１０において、この変調回路は、図９と
同様に、位相信号生成部８１と、Ｄ／Ａ変換器３、４
と、直交変換器５と、ＩＦシンセサイザ６と、ＲＦシン
セサイザ８とが設けられている。In FIG. 10, this modulation circuit comprises a phase signal generation section 81 and D / A converters 3, 4 as in FIG.
, An orthogonal transformer 5, an IF synthesizer 6, and an RF synthesizer 8.

【００１７】直交変調器５出力の帯域外不要信号成分
は、バンドパスフィルタ１１で除去された後、アップコ
ンバートミキサ１２でＲＦシンセサイザ８出力のローカ
ル信号と乗算され、無線周波数帯へ周波数変換される。
ミキサ１２の出力には、イメージ信号やスプリアスや帯
域外雑音成分（図１７の波形Ｂ）が含まれているので、
バンドパスフィルタ１３でそれらを除去して本来の波形
とする（図１７の波形Ａ）。フィルタ１３の出力信号
は、ドライバアンプ１４で前置増幅された後、電力増幅
器９へ入力される。Unwanted out-of-band signal components output from the quadrature modulator 5 are removed by a band-pass filter 11, then multiplied by a local signal output from the RF synthesizer 8 by an up-convert mixer 12, and frequency-converted to a radio frequency band. .
Since the output of the mixer 12 contains an image signal, spurious, and out-of-band noise components (waveform B in FIG. 17),
These are removed by the band-pass filter 13 to obtain an original waveform (waveform A in FIG. 17). The output signal of the filter 13 is input to the power amplifier 9 after being pre-amplified by the driver amplifier 14.

【００１８】電力増幅器９の利得は、図９で説明したの
と同様に、制御部によって、その電力利得が制御され
る。The power gain of the power amplifier 9 is controlled by the control unit in the same manner as described with reference to FIG.

【００１９】この変調方式では、ループを構成していな
いので、電力増幅器９より前の各段の雑音がそのまま合
算されて電力増幅器９の出力にあらわれる。システム送
信帯域外への雑音の漏洩を抑えるために、電力増幅器９
の出力には、通常、急峻な帯域選択特性を持つシステム
帯域通過フィルタ１５が設けられなければならない。In this modulation system, since no loop is formed, the noise of each stage before the power amplifier 9 is added as it is and appears at the output of the power amplifier 9. In order to suppress noise leakage outside the system transmission band, the power amplifier 9
Must be provided with a system bandpass filter 15 having a sharp band selection characteristic.

【００２０】一般に、帯域選択特性を急峻にしようとす
れば、通過帯域での損失も大きくなる傾向にあるので、
フィルタ１５での電力損失分を補うため、電力増幅器９
の出力電力を大きくしなければならず、消費電力が低く
抑えられないという問題がある。Generally, if the band selection characteristic is to be made steep, the loss in the pass band tends to increase.
To compensate for the power loss in the filter 15, the power amplifier 9
However, there is a problem in that the output power must be increased, and the power consumption cannot be kept low.

【００２１】また同様に図１０に示す変調方式では、周
波数選択特性がすぐれた多くのフィルタ１１，１３が必
要となり、高価で大型の部品を使用しなければならない
という問題がある。Similarly, the modulation system shown in FIG. 10 requires many filters 11 and 13 having excellent frequency selection characteristics, and has a problem that expensive and large-sized components must be used.

【００２２】[0022]

【発明が解決しようとする課題】以上説明したように従
来変調回路においては、例えば図９に示す変調方式で
は、位相に対してしかループが構成していないので、振
幅変動分を持つ変調信号には適応できず、振幅変動分を
持つ信号で変調するには、図１０のような構成にする必
要がある。しかしこの構成では、ループを構成せずに周
波数変換しているので、図１７の波形Ｂのように被変調
波に帯域外雑音が多く含まれており、これを除去するた
めには、形状が大きく高価なフィルタを多用しなければ
ならないという問題がある。As described above, in the conventional modulation circuit, for example, in the modulation method shown in FIG. 9, since a loop is formed only for the phase, a modulation signal having an amplitude variation is generated. Cannot be applied, and in order to modulate with a signal having an amplitude fluctuation, a configuration as shown in FIG. 10 is required. However, in this configuration, since frequency conversion is performed without forming a loop, a large amount of out-of-band noise is included in the modulated wave as shown in a waveform B in FIG. 17. There is a problem that large and expensive filters must be used frequently.

【００２３】本発明は上記した問題に鑑み、振幅変動を
含む変調信号に対しても帯域外雑音の少ないＲＦ信号を
得る変調方式を提供することを目的とする。The present invention has been made in view of the above-described problems, and has as its object to provide a modulation method for obtaining an RF signal with little out-of-band noise even for a modulation signal containing amplitude fluctuations.

【００２４】[0024]

【課題を解決するための手段】本発明は、与えられた変
調信号に基づき位相信号と振幅成分とを抽出する抽出手
段と、前記抽出手段から受けた前記位相信号をアナログ
変換してアナログ信号を出力するアナログ変換手段と、
前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、前記直交変
調手段から受けた前記ＩＦ信号を周波数変換してＲＦ信
号を出力する周波数変換手段と、前記抽出手段から受け
た前記振幅成分を所定時間だけ遅延させた振幅成分信号
を出力する遅延手段と、前記遅延手段から受けた前記振
幅成分信号に基づいて、前記周波数変換手段から受けた
前記ＲＦ信号の振幅を可変し出力する出力手段とを有す
ることを特徴とする変調回路である。SUMMARY OF THE INVENTION According to the present invention, there is provided extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and converting the phase signal received from the extracting means into an analog signal. Analog conversion means for outputting;
A quadrature modulator for orthogonally modulating the analog signal received from the analog converter and outputting an IF signal; a frequency converter for frequency-converting the IF signal received from the quadrature modulator and outputting an RF signal; A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the extraction unit by a predetermined time; and, based on the amplitude component signal received from the delay unit, the RF signal received from the frequency conversion unit. Output means for varying and outputting the amplitude.

【００２５】本発明は第１実施形態を特定するものであ
り、従来のように単に位相信号のみを変調するものでは
なく、変調信号から振幅成分を抽出しこれに基づいて変
調後の信号を増幅する利得可変器を設けたものである。
これにより、変調信号の振幅変動分をも含めて変調する
ことで更に精度の高い変調処理を実現するものである。The present invention specifies the first embodiment. Rather than simply modulating only a phase signal as in the prior art, an amplitude component is extracted from the modulated signal, and the modulated signal is amplified based on the amplitude component. The gain variable device is provided.
This realizes a modulation process with higher accuracy by modulating the signal including the amplitude fluctuation of the modulation signal.

【００２６】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調手段と、前記直交変調手段から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換手段と、前記抽出手段から受けた前記振幅成分
を所定時間だけ遅延させた振幅成分信号を出力する遅延
手段と、前記遅延手段から受けた前記振幅成分信号に基
づいて、前記周波数変換手段から受けた前記ＲＦ信号の
振幅を可変し出力する出力手段と、当該変調回路の出力
信号の電力の平均値を求めこれに基づいて、前記出力手
段から受けた前記ＲＦ信号の電力を増幅して前記出力信
号を出力する電力増幅手段とを有することを特徴とする
変調回路である。According to the present invention, there is provided an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter and outputting an IF signal; a frequency converter for frequency-converting the IF signal received from the quadrature modulator and outputting an RF signal; A delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction means by a predetermined time; and the RF signal received from the frequency conversion means based on the amplitude component signal received from the delay means. Output means for varying and outputting the amplitude of the signal, and calculating the average value of the power of the output signal of the modulation circuit, based on the average value, and receiving the average value from the output means. A modulation circuit and having a power amplifier means for amplifying the power of the F signal and outputs the output signal.

【００２７】本発明は第３実施形態を特定するものであ
り、第１実施形態の利得可変器に加えて、変調回路の出
力信号の平均値に応じて出力の電力を増幅することによ
り、更に精度の高い変調回路を提供するものである。The present invention specifies the third embodiment. In addition to the gain variable device of the first embodiment, the present invention further amplifies the output power according to the average value of the output signal of the modulation circuit. It is intended to provide a highly accurate modulation circuit.

【００２８】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調手段と、前記直交変調手段から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換手段と、前記抽出手段から受けた振幅成分を遅
延させるべき遅延時間を設定する遅延時間設定手段と、
前記遅延時間設定手段により設定された前記遅延時間に
応じて、前記抽出手段から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延手段と、前記遅延手段から
受けた前記振幅成分信号に基づいて、前記周波数変換手
段から受けた前記ＲＦ信号の振幅を可変し出力する出力
手段とを有することを特徴とする変調回路である。According to the present invention, there is provided an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter and outputting an IF signal; a frequency converter for frequency-converting the IF signal received from the quadrature modulator and outputting an RF signal; Delay time setting means for setting a delay time for delaying the amplitude component received from the extracting means,
A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the extraction unit in accordance with the delay time set by the delay time setting unit, based on the amplitude component signal received from the delay unit. Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means.

【００２９】本発明は第５実施形態を特定するものであ
り、位相信号と振幅成分との伝送路の伝送時間を微細に
調節するべく遅延時間設定回路を設けることで、帯域外
雑音が少ない正確な変調処理による変調回路を提供する
ものである。The present invention specifies the fifth embodiment. By providing a delay time setting circuit to finely adjust the transmission time of a transmission path between a phase signal and an amplitude component, an accurate out-of-band noise is reduced. It is intended to provide a modulation circuit by a simple modulation process.

【００３０】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調手段と、前記直交変調手段から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換手段と、前記変調信号の信号形式と周波数帯と
周辺温度との少なくともどれか一つに基づいて、前記抽
出手段から受けた振幅成分を遅延させるべき遅延時間を
設定する遅延時間設定手段と、前記遅延時間設定手段に
より設定された前記遅延時間に応じて、前記抽出手段か
ら受けた振幅成分を遅延させた振幅成分信号を出力する
遅延手段と、前記遅延手段から受けた前記振幅成分信号
に基づいて、前記周波数変換手段から受けた前記ＲＦ信
号の振幅を可変し出力する出力手段とを有することを特
徴とする変調回路である。According to the present invention, there is provided an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter and outputting an IF signal; a frequency converter for frequency-converting the IF signal received from the quadrature modulator and outputting an RF signal; Delay time setting means for setting a delay time for delaying the amplitude component received from the extracting means based on at least one of a signal format, a frequency band, and an ambient temperature of the modulation signal; and A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the extraction unit according to the delay time set by the setting unit; On the basis of the amplitude component signal received from the extension unit, a modulation circuit and having an output means for varying output amplitude of the RF signal received from said frequency converting means.

【００３１】本発明は第５実施形態を特定するものであ
り、位相信号と振幅成分との伝送路の伝送時間を微細に
調節するべく遅延時間の変動要因となる変調信号の信号
形式や周波数帯、周辺温度等の変動に応じて遅延時間を
設定する遅延時間設定回路を設けている。これにより、
帯域外雑音の少ない正確な変調処理による変調回路を提
供するものである。The present invention specifies a fifth embodiment, in which the signal format and frequency band of a modulated signal that causes a delay time variation in order to finely adjust the transmission time of a transmission path between a phase signal and an amplitude component. And a delay time setting circuit for setting a delay time according to a change in ambient temperature or the like. This allows
It is an object of the present invention to provide a modulation circuit that performs accurate modulation processing with little out-of-band noise.

【００３２】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調手段と、前記直交変調手段から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換手段と、前記抽出手段から受けた振幅成分を所
定時間だけ遅延させた振幅成分信号を出力する遅延手段
と、前記遅延手段から受けた前記振幅成分信号につい
て、式又は変換テーブルを用いて出力手段の利得制御特
性の直線性を補正すべく設けられた補正手段と、前記補
正手段から受けた直線性の補正がなされた前記振幅成分
信号に基づき、前記周波数変換手段から受けた前記ＲＦ
信号の振幅を可変し出力する出力手段とを有することを
特徴とする変調回路である。The present invention also provides an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter and outputting an IF signal; a frequency converter for frequency-converting the IF signal received from the quadrature modulator and outputting an RF signal; A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the extraction unit by a predetermined time; and a gain control of the output unit using an equation or a conversion table for the amplitude component signal received from the delay unit. Correction means provided to correct the linearity of the characteristic, based on the amplitude component signal subjected to the linearity correction received from the correction means, The RF received from the wave number conversion means
Output means for varying and outputting the amplitude of the signal.

【００３３】本発明は第６実施形態を特定するものであ
り、後述の出力手段の利得制御特性の非線形性を補正を
するべく直線性補正回路を設けたものである。これによ
り適性な振幅成分信号に基づいた、帯域外雑音の少ない
正確な変調処理による変調回路を提供するものである。The present invention specifies a sixth embodiment, in which a linearity correction circuit is provided to correct a non-linearity of a gain control characteristic of an output means described later. This provides a modulation circuit based on an appropriate amplitude component signal and performing accurate modulation processing with little out-of-band noise.

【００３４】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をデジタル的に直交変調し
てＩＦ信号を出力する直交変調手段と、前記直交変調手
段から受けた前記ＩＦ信号をアナログ変換してアナログ
ＩＦ信号を出力するアナログ変換手段と、前記アナログ
変換手段から受けた前記アナログＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、前記抽出手
段から受けた振幅成分を所定時間だけ遅延させた振幅成
分信号を出力する遅延手段と、前記遅延手段から受けた
前記振幅成分信号に基づいて、前記周波数変換手段から
受けた前記ＲＦ信号の振幅を可変し出力する出力手段と
を有することを特徴とする変調回路である。According to the present invention, there is provided an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and digitally orthogonally modulating the phase signal received from the extracting means to output an IF signal. A quadrature modulator, an analog converter that converts the IF signal received from the quadrature modulator into an analog IF signal, and an analog IF signal received from the analog converter. Frequency converting means for outputting, an amplitude component signal obtained by delaying the amplitude component received from the extracting means for a predetermined time, and the frequency converting means based on the amplitude component signal received from the delay means. Output means for varying and outputting the amplitude of the RF signal received from the modulation circuit.

【００３５】本発明は第７実施形態を特定するものであ
り、第１実施形態の特徴に加えて、従来のように変調信
号をＤ／Ａ変換した後に変調処理するのではなく、変調
信号をそのままデジタル的に直交変調するものである。
これにより、より正確な変調処理を実現するだけでな
く、一つのＤ／Ａ変換器を設けるだけで同等の処理が可
能となる。The present invention specifies the seventh embodiment. In addition to the features of the first embodiment, the present invention does not perform modulation processing after D / A conversion of a modulation signal as in the related art, but modulates the modulation signal. The digital quadrature modulation is performed as it is.
As a result, not only a more accurate modulation process can be realized, but also the same process can be performed only by providing one D / A converter.

【００３６】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を第１局部発信周波数信
号に基づき直交変調してＩＦ信号を出力する直交変調手
段と、前記直交変調手段から受けた前記ＩＦ信号を第１
フィルタで帯域制限して第１分周器で分周し、第２局部
発振周波数信号とＲＦ信号とを乗算器で乗算し、前記乗
算器出力を第２フィルタで帯域制限して第２分周器で分
周し、更に位相比較器で前記第１分周器出力と前記第２
分周器出力との位相差を検出し、この位相差に応じた信
号を第３フィルタ７７で平滑化することで、前記ＩＦ信
号の周波数変換を実現して前記ＲＦ信号を出力する周波
数変換手段と、前記抽出手段から受けた振幅成分を所定
時間だけ遅延させた振幅成分信号を出力する遅延手段
と、前記遅延手段から受けた前記振幅成分信号に基づい
て、前記周波数変換手段から受けた前記ＲＦ信号の振幅
を可変し出力する出力手段とを有することを特徴とする
変調回路である。Also, the present invention provides an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter based on a first local oscillation frequency signal to output an IF signal;
The band is limited by a filter, the frequency is divided by a first frequency divider, the second local oscillation frequency signal and the RF signal are multiplied by a multiplier, and the output of the multiplier is band-limited by a second filter to a second frequency division. The output of the first frequency divider is compared with the output of the second frequency divider by a phase comparator.
Frequency conversion means for detecting a phase difference from the output of the frequency divider and smoothing a signal corresponding to the phase difference by a third filter 77, thereby realizing frequency conversion of the IF signal and outputting the RF signal Delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction means by a predetermined time; and the RF received from the frequency conversion means based on the amplitude component signal received from the delay means. Output means for varying and outputting the amplitude of the signal.

【００３７】本発明は第２実施形態を特定するものであ
り、第１実施形態の特徴に加えて、周波数変換処理を図
２に示す回路構造により３つのフィルタにより、安定し
た変調処理を実現するものである。The present invention specifies the second embodiment. In addition to the features of the first embodiment, the frequency conversion process is realized by three filters using the circuit structure shown in FIG. Things.

【００３８】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出手段と、前記抽出
手段から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換手段と、前記アナログ変
換手段から受けたアナログ信号を第１局部発信周波数信
号に基づき直交変調してＩＦ信号を出力する直交変調手
段と、前記直交変調手段から受けた前記ＩＦ信号を第１
フィルタで帯域制限し、このフィルタ出力と第２局部発
振周波数信号とを乗算器で乗算し、この乗算出力を第２
フィルタで帯域制限することにより周波数変換してＲＦ
信号を出力する周波数変換手段と、前記抽出手段から受
けた振幅成分を所定時間だけ遅延させた振幅成分信号を
出力する遅延手段と、前記遅延手段から受けた前記振幅
成分信号に基づいて、前記周波数変換手段から受けた前
記ＲＦ信号の振幅を可変し出力する出力手段とを有する
ことを特徴とする変調回路である。According to the present invention, there is provided an extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal. A quadrature modulator for orthogonally modulating an analog signal received from the analog converter based on a first local oscillation frequency signal to output an IF signal;
The band is limited by a filter, and the filter output is multiplied by a second local oscillation frequency signal by a multiplier.
Frequency conversion by limiting the band with a filter and RF
Frequency conversion means for outputting a signal; delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction means for a predetermined time; and the frequency based on the amplitude component signal received from the delay means. Output means for varying and outputting the amplitude of the RF signal received from the conversion means.

【００３９】本発明は第４実施形態を特定するものであ
り、第１実施形態の特徴に加えて、周波数変換処理を図
４に示す回路構造により２つのフィルタにより、安定し
た変調処理を実現するものである。The present invention specifies the fourth embodiment. In addition to the features of the first embodiment, the frequency conversion processing is realized by two filters using the circuit structure shown in FIG. Things.

【００４０】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調工程と、前記直交変調工程から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換工程と、前記抽出工程から受けた前記振幅成分
を所定時間だけ遅延させた振幅成分信号を出力する遅延
工程と、前記遅延工程から受けた前記振幅成分信号に基
づいて、前記周波数変換工程から受けた前記ＲＦ信号の
振幅を可変し出力する増幅工程とを有することを特徴と
する変調方法である。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating the analog signal received from the analog conversion step and outputting an IF signal; and a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal. A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time, and the RF received from the frequency conversion step based on the amplitude component signal received from the delay step. An amplification step of varying and outputting a signal amplitude.

【００４１】本発明の変調方法においても、変調回路の
場合と同様の趣旨で、変調信号の振幅変動分をも含めて
変調することにより更に精度の高い変調処理を実現する
ものである。In the modulation method of the present invention as well, in the same manner as in the case of the modulation circuit, modulation with higher accuracy is realized by performing modulation including the amplitude fluctuation of the modulation signal.

【００４２】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調工程と、前記直交変調工程から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換工程と、前記抽出工程から受けた前記振幅成分
を所定時間だけ遅延させた振幅成分信号を出力する遅延
工程と、前記遅延工程から受けた前記振幅成分信号に基
づいて、前記周波数変換工程から受けた前記ＲＦ信号の
振幅を可変し出力する増幅工程と、当該変調方法による
出力信号の電力の平均値を求めこれに基づいて、前記増
幅工程から受けた前記ＲＦ信号の電力を増幅して前記出
力信号を出力する電力増幅工程とを有することを特徴と
する変調方法である。The present invention also provides an extracting step for extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step for converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating the analog signal received from the analog conversion step and outputting an IF signal; and a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal. A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time, and the RF received from the frequency conversion step based on the amplitude component signal received from the delay step. Amplifying step of varying and outputting the amplitude of the signal, and calculating the average value of the power of the output signal by the modulation method, based on the average value, and Is a modulation method characterized by having a power amplification step for amplifying the power of the serial RF signal and outputs the output signal.

【００４３】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調工程と、前記直交変調工程から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換工程と、前記抽出工程から受けた振幅成分を遅
延させるべき遅延時間を設定する遅延時間設定工程と、
前記遅延時間設定工程により設定された前記遅延時間に
応じて、前記抽出工程から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延工程と、前記遅延工程から
受けた前記振幅成分信号に基づいて、前記周波数変換工
程から受けた前記ＲＦ信号の振幅を可変し出力する増幅
工程とを有することを特徴とする変調方法である。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating the analog signal received from the analog conversion step and outputting an IF signal; and a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal. A delay time setting step of setting a delay time for delaying the amplitude component received from the extraction step;
A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step in accordance with the delay time set in the delay time setting step, based on the amplitude component signal received from the delay step An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step.

【００４４】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を直交変調してＩＦ信号
を出力する直交変調工程と、前記直交変調工程から受け
た前記ＩＦ信号を周波数変換してＲＦ信号を出力する周
波数変換工程と、前記変調信号の信号形式と周波数帯と
周辺温度との少なくともどれか一つに基づいて、前記抽
出工程から受けた振幅成分を遅延させるべき遅延時間を
設定する遅延時間設定工程と、前記遅延時間設定工程に
より設定された前記遅延時間に応じて、前記抽出工程か
ら受けた振幅成分を遅延させた振幅成分信号を出力する
遅延工程と、前記遅延工程から受けた前記振幅成分信号
に基づいて、前記周波数変換工程から受けた前記ＲＦ信
号の振幅を可変し出力する増幅工程とを有することを特
徴とする変調方法である。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating the analog signal received from the analog conversion step and outputting an IF signal; and a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal. A delay time setting step of setting a delay time for delaying the amplitude component received from the extraction step based on at least one of a signal format, a frequency band, and an ambient temperature of the modulation signal; and A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step according to the delay time set in the setting step; Based on the amplitude signal received from the rolling process is a modulation method characterized by having an amplification step of the amplitude variable and the output of the RF signal received from the frequency conversion step.

【００４５】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、記アナログ変換
工程から受けたアナログ信号を直交変調してＩＦ信号を
出力する直交変調工程と、前記直交変調工程から受けた
前記ＩＦ信号を周波数変換してＲＦ信号を出力する周波
数変換工程と、前記抽出工程から受けた振幅成分を所定
時間だけ遅延させた振幅成分信号を出力する遅延工程
と、前記遅延工程から受けた前記振幅成分信号につい
て、式又は変換テーブルを用いて増幅工程の直線性の補
正をするべく補正工程と、前記補正工程から受けた直線
性の補正がなされた前記振幅成分信号に基づき、前記周
波数変換工程から受けた前記ＲＦ信号の振幅を可変し出
力する増幅工程とを有することを特徴とする変調方法で
ある。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step and outputting an IF signal; and a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal. A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time; and a linearity of the amplification step using an equation or a conversion table for the amplitude component signal received from the delay step. A correction step for performing the correction, and receiving from the frequency conversion step based on the amplitude component signal corrected for linearity received from the correction step. Is a modulation method characterized by having an amplification step of the amplitude variable and the output of the RF signal.

【００４６】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をデジタル的に直交変調し
てＩＦ信号を出力する直交変調工程と、前記直交変調工
程から受けた前記ＩＦ信号をアナログ変換してアナログ
ＩＦ信号を出力するアナログ変換工程と、前記アナログ
変換工程から受けた前記アナログＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、前記抽出工
程から受けた振幅成分を所定時間だけ遅延させた振幅成
分信号を出力する遅延工程と、前記遅延工程から受けた
前記振幅成分信号に基づいて、前記周波数変換工程から
受けた前記ＲＦ信号の振幅を可変し出力する増幅工程と
を有することを特徴とする変調方法である。According to the present invention, there is provided an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and digitally orthogonally modulating the phase signal received from the extracting step to output an IF signal. A quadrature modulation step, an analog conversion step of converting the IF signal received from the quadrature modulation step into an analog signal and outputting an analog IF signal, and converting the analog IF signal received from the analog conversion step into a frequency signal, A frequency conversion step of outputting, an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time, and a frequency conversion step based on the amplitude component signal received from the delay step. An amplification step of varying and outputting the amplitude of the RF signal received from the receiver.

【００４７】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を第１局部発信周波数信
号に基づき直交変調してＩＦ信号を出力する直交変調工
程と、前記直交変調工程から受けた前記ＩＦ信号を第１
フィルタで帯域制限して第１分周器で分周し、第２局部
発振周波数信号とＲＦ信号とを乗算器で乗算し、前記乗
算器出力を第２フィルタで帯域制限して第２分周器で分
周し、更に位相比較器で前記第１分周器出力と前記第２
分周器出力との位相差を検出し、この位相差に応じた信
号を第３フィルタ７７で平滑化することで、前記ＩＦ信
号の周波数変換を実現して前記ＲＦ信号を出力する周波
数変換工程と、前記抽出工程から受けた振幅成分を所定
時間だけ遅延させた振幅成分信号を出力する遅延工程
と、前記遅延工程から受けた前記振幅成分信号に基づい
て、前記周波数変換工程から受けた前記ＲＦ信号の振幅
を可変し出力する増幅工程とを有することを特徴とする
変調方法である。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step based on a first local oscillation frequency signal to output an IF signal;
The band is limited by a filter, the frequency is divided by a first frequency divider, the second local oscillation frequency signal and the RF signal are multiplied by a multiplier, and the output of the multiplier is band-limited by a second filter to a second frequency division. The output of the first frequency divider is compared with the output of the second frequency divider by a phase comparator.
A frequency conversion step of detecting a phase difference from an output of the frequency divider and smoothing a signal corresponding to the phase difference by a third filter 77, thereby realizing frequency conversion of the IF signal and outputting the RF signal. A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time; and the RF received from the frequency conversion step based on the amplitude component signal received from the delay step. An amplification step of varying and outputting a signal amplitude.

【００４８】又本発明は、与えられた変調信号に基づき
位相信号と振幅成分とを抽出する抽出工程と、前記抽出
工程から受けた前記位相信号をアナログ変換してアナロ
グ信号を出力するアナログ変換工程と、前記アナログ変
換工程から受けたアナログ信号を第１局部発信周波数信
号に基づき直交変調してＩＦ信号を出力する直交変調工
程と、前記直交変調工程から受けた前記ＩＦ信号を第１
フィルタで帯域制限し、このフィルタ出力と第２局部発
振周波数信号とを乗算器で乗算し、この乗算出力を第２
フィルタで帯域制限することにより周波数変換してＲＦ
信号を出力する周波数変換工程と、前記抽出工程から受
けた振幅成分を所定時間だけ遅延させた振幅成分信号を
出力する遅延工程と、前記遅延工程から受けた前記振幅
成分信号に基づいて、前記周波数変換工程から受けた前
記ＲＦ信号の振幅を可変し出力する増幅工程とを有する
ことを特徴とする変調方法である。The present invention also provides an extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, and an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal. A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step based on a first local oscillation frequency signal to output an IF signal;
The band is limited by a filter, and the filter output is multiplied by a second local oscillation frequency signal by a multiplier.
Frequency conversion by limiting the band with a filter and RF
A frequency conversion step of outputting a signal, a delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time, and the frequency conversion step based on the amplitude component signal received from the delay step. An amplification step of varying and outputting the amplitude of the RF signal received from the conversion step.

【００４９】本発明の変調方法においても、変調回路の
場合と同様の趣旨で、変調信号の振幅変動分をも含めて
変調することにより更に精度の高い変調処理を実現する
ものである。Also in the modulation method of the present invention, a modulation process with higher accuracy is realized by modulating the modulation signal including the amplitude fluctuation of the modulation signal for the same purpose as the modulation circuit.

【００５０】[0050]

【発明の実施の形態】以下、この発明の一実施の形態に
ついて図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.

【００５１】初めに本発明の第１の実施形態について以
下に説明する。第１の実施形態は、本発明の基本形態を
示すものであり、変調信号から抽出した振幅成分に基づ
く利得可変部９の働きにより、振幅変動を含む変調信号
に対しても帯域外雑音の少ないＲＦ信号を得ることが可
能となる。First, a first embodiment of the present invention will be described below. The first embodiment shows a basic mode of the present invention, and the function of a gain variable unit 9 based on an amplitude component extracted from a modulation signal causes less out-of-band noise even for a modulation signal containing amplitude fluctuations. An RF signal can be obtained.

【００５２】図１は、本発明の第１の一実施形態を示す
ブロック図であり、この図における変調回路は、位相信
号・振幅成分生成部１と、Ｄ／Ａ変換器３，４，１０
と、直交変調器５と、周波数変換器７と、利得可変器９
と、遅延回路２３と、加算器２４とを有している。FIG. 1 is a block diagram showing a first embodiment of the present invention. The modulation circuit shown in FIG. 1 includes a phase signal / amplitude component generator 1 and D / A converters 3, 4, and 10.
, Quadrature modulator 5, frequency converter 7, and gain variable device 9
, A delay circuit 23, and an adder 24.

【００５３】このような構造において、変調信号はこの
位相信号・振幅成分生成部１により位相成分と振幅成分
とが抽出される。また、その位相成分はＩ、Ｑの直交ベ
クトルに分解される。このＩ、Ｑ直交ベクトルの合成ベ
クトルの大きさは常に一定である。つまり、Ｉ2 ＋Ｑ2
＝Ｃonst.が成り立つ。具体的な一例としてＣＰＵの管
理下において与えられる変調信号に応じて、初めからメ
モリに記憶している値を読み出し、これを位相信号、振
幅出力として出力しても良い。In such a structure, the phase signal and the amplitude component are extracted from the modulated signal by the phase signal / amplitude component generator 1. The phase component is decomposed into I and Q orthogonal vectors. The magnitude of the composite vector of the I and Q orthogonal vectors is always constant. That is, I 2 + Q 2
= Const. As a specific example, a value stored in the memory may be read from the beginning according to a modulation signal given under the control of the CPU, and this may be output as a phase signal and an amplitude output.

【００５４】ベースバンド直交位相信号は位相信号・振
幅成分生成部１からＤ／Ａ変換器３、４に供給されてア
ナログ信号に変換される。直交変調器５において、ＩＦ
ローカル信号端子６から入力されるＩＦローカル信号に
Ｄ／Ａ変換器３、４の出力で直交変調を施し、直交変調
されたＩＦ信号が直交変調器５の出力として得られる。The baseband quadrature phase signal is supplied from the phase signal / amplitude component generator 1 to the D / A converters 3 and 4 and is converted into an analog signal. In the quadrature modulator 5, the IF
The quadrature modulation is performed on the IF local signal input from the local signal terminal 6 by the outputs of the D / A converters 3 and 4, and the quadrature modulated IF signal is obtained as the output of the quadrature modulator 5.

【００５５】周波数変換器７ではＲＦローカル入力端子
から入力されたＲＦローカル信号を用いてＩＦ信号を搬
送波周波数まで周波数変換する。一般的にＩＦ信号周波
数ｆ IFとＲＦローカル周波数ｆlocalと搬送周波数ｆ
carrierとの関係は次のようになる。In the frequency converter 7, an RF local input terminal
IF signal using RF local signal input from
The frequency is converted to the transmission frequency. Generally IF signal frequency
Number f IFAnd RF local frequency flocalAnd carrier frequency f
carrierIs as follows.

【００５６】 ｆcarrier＝ｆlocal−ｆIF または、 ｆcarrier＝ｆlocal＋ｆIF ここで、ＲＦローカル周波数ｆlocalを可変することに
より、各チャネルに応じた周波数に送信波を設定するこ
とができる。F carrier = f local −f IF or f carrier = f local + f IF Here, by varying the RF local frequency f local , a transmission wave can be set to a frequency corresponding to each channel.

【００５７】遅延回路２３は、位相信号の伝送経路３、
４、５、７の系と振幅信号の伝送経路２３、２４、１０
の系との伝送時間差を調整するためのものである。遅延
回路２３を通った後、変調信号の振幅分は送信すべき出
力電力の平均値と加算器２４で合成される。加算器２４
の出力はＤ／Ａ変換器１０でアナログ信号に変換され、
利得可変器９の利得制御信号となる。The delay circuit 23 has a transmission path 3 for the phase signal,
4, 5, 7 system and amplitude signal transmission paths 23, 24, 10
This is for adjusting the transmission time difference with the system. After passing through the delay circuit 23, the amplitude of the modulated signal is combined with the average value of the output power to be transmitted by the adder 24. Adder 24
Is converted into an analog signal by the D / A converter 10,
It becomes a gain control signal of the gain variable device 9.

【００５８】利得可変器９は、周波数変換器７出力の位
相変調された無線周波数信号をＤ／Ａ変換器１０出力の
利得制御信号で示される利得で電力増幅する。利得可変
器９出力には、変調波の位相成分と振幅成分とが合成さ
れた被変調波信号を得ることができる。The gain variable unit 9 amplifies the power of the phase-modulated radio frequency signal output from the frequency converter 7 with the gain indicated by the gain control signal output from the D / A converter 10. A modulated wave signal in which the phase component and the amplitude component of the modulated wave are combined can be obtained from the output of the gain variable device 9.

【００５９】又、本発明の第２の実施形態として、第１
実施形態の変調回路の周波数変換器７へ位相同期変調ル
ープを設けた例が挙げられる。As a second embodiment of the present invention, the first embodiment
There is an example in which a phase-locked modulation loop is provided in the frequency converter 7 of the modulation circuit of the embodiment.

【００６０】ここで述べた周波数変換器７へ「位相同期
変調ループ」を適用した場合のブロックの構成例を図２
に示す。FIG. 2 shows an example of a block configuration in the case where the “phase-locked modulation loop” is applied to the frequency converter 7 described here.
Shown in

【００６１】又、本発明の第３の実施形態として、利得
可変部の後に更に電力増幅部を設けた場合を図３を用い
て以下に説明する。Further, as a third embodiment of the present invention, a case where a power amplifying section is further provided after the variable gain section will be described below with reference to FIG.

【００６２】図３は、本発明の第３実施形態を示してお
り、図１と同一部分には同一符号を付しており、更に、
電力増幅器９−２と、これに接続されるＤ／Ａ変換器１
０とが示されている。FIG. 3 shows a third embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals.
Power amplifier 9-2 and D / A converter 1 connected thereto
0 is shown.

【００６３】図１では、出力平均電力と変調振幅成分を
ベースバンドのデジタル部で合成していた。この実施形
態では、出力平均電力の制御のみＤ／Ａ変換器１０を介
し、電力増幅器９−２の増幅利得を変えることにより行
う。振幅変調信号は、遅延回路２３で伝送時間の調整が
された後、新たに設けたＤ／Ａ変換器２５でアナログ値
に変換され、利得可変器９の利得制御信号として入力さ
れる。周波数変換器７の出力の位相変調された信号に利
得可変器９で変調信号の振幅成分を合成し、被変調波を
得る。更に電力増幅器９−２において出力平均電力値に
より指示された値で利得可変器９出力を電力増幅し、最
終的な送信信号を得る。これにより、更に高い制御制度
を実現するものである。In FIG. 1, the output average power and the modulation amplitude component are combined in the baseband digital section. In this embodiment, only the output average power is controlled by changing the amplification gain of the power amplifier 9-2 via the D / A converter 10. After adjusting the transmission time in the delay circuit 23, the amplitude modulation signal is converted into an analog value by the newly provided D / A converter 25, and is input as a gain control signal of the gain variable device 9. The amplitude component of the modulation signal is synthesized by the gain variable unit 9 with the phase-modulated signal output from the frequency converter 7 to obtain a modulated wave. Further, the power amplifier 9-2 power-amplifies the output of the gain variable device 9 with the value indicated by the output average power value, and obtains a final transmission signal. As a result, a higher control system is realized.

【００６４】又、Ｄ／Ａ変換器１０，２５が制御する増
幅器の順番を入れ替えて構成することも可能である。つ
まり、Ｄ／Ａ変換器２５の出力で電力増幅器９−２の利
得を制御し、Ｄ／Ａ変換器１０の出力で利得可変部９の
利得を制御する構成も成り立つ。The order of the amplifiers controlled by the D / A converters 10 and 25 can be changed. That is, a configuration in which the gain of the power amplifier 9-2 is controlled by the output of the D / A converter 25 and the gain of the gain variable unit 9 is controlled by the output of the D / A converter 10 is also realized.

【００６５】又、本発明の第４の実施形態として、周波
数変換部７にアップコンバータミキサを用いた場合を図
４を用いて以下に説明する。As a fourth embodiment of the present invention, a case where an up-converter mixer is used for the frequency conversion unit 7 will be described below with reference to FIG.

【００６６】図４において、この周波数変換器７は、Ｉ
Ｆバンドパスフィルタ１１と、リミッタ増幅器１１−２
と、アップコンバータミキサ１２と、バンドパスフィル
タ１３とを有している。これにより、ＩＦバンドパスフ
ィルタ１１を通過したＩＦ信号振幅を更に増幅すること
でアップコンバータミキサ１２に入力されるＩＦ信号の
信号対雑音比を改善することができる。In FIG. 4, this frequency converter 7
F band pass filter 11 and limiter amplifier 11-2
And an up-converter mixer 12 and a band-pass filter 13. Thereby, the signal-to-noise ratio of the IF signal input to the up-converter mixer 12 can be improved by further amplifying the amplitude of the IF signal passed through the IF band-pass filter 11.

【００６７】つまり、ミキサ１２、利得可変器９などは
振幅に対して非線形動作させてもかまわないので、低消
費電流で、信号対雑音比の良い伝送が可能となる。That is, since the mixer 12, the gain variable device 9 and the like may be operated non-linearly with respect to the amplitude, transmission with a low current consumption and a good signal-to-noise ratio becomes possible.

【００６８】又本発明の第５の実施形態として、伝送路
に応じた所要時間を考慮した遅延時間設定部２６を設け
これにより遅延時間を正確に設定する場合を、図５を用
いて以下に説明する。図５において、図１、図３と同一
部分には同一符号を付して示してある。ここで、遅延回
路２３には、遅延時間設定部２６から入力される遅延時
間信号により遅延時間が変えられるようになっている。As a fifth embodiment of the present invention, a case in which a delay time setting unit 26 is provided in consideration of a required time according to a transmission path and a delay time is accurately set by using the delay time setting unit 26 will be described below with reference to FIG. explain. 5, the same parts as those in FIGS. 1 and 3 are denoted by the same reference numerals. Here, the delay time of the delay circuit 23 can be changed by a delay time signal input from the delay time setting unit 26.

【００６９】つまり、位相信号の伝送経路３、４、５、
７と振幅信号の伝送経路２３、１０との伝送時間差を調
整するために遅延回路２３が挿入されている。各伝送経
路の遅延時間は、常に一定ではなく、変調信号形式や変
調指数や周波数帯や各段レベルダイヤや周囲温度など様
々な要因によって変わりうる。遅延回路２３は遅延時間
可変機能を持つので、例えば、π／４ｓｈｉｆｔＱＰＳ
Ｋ変調信号のロールオフ率が変わった時やシステム通信
帯域が大きく変わった時など、図示しない信号処理部か
らの指示により、遅延回路２３の遅延時間を調節して、
常に最適な変調が行われるようにしたものである。従っ
て遅延時間設定部２６では、少なくとも周辺温度、変調
信号周波数、電源電圧等の伝送時間差の変動要因となる
ものに基づいてそのときそのときの最適な遅延時間を設
定することで、更に精密な帯域外雑音の減衰が可能とな
る。That is, the transmission paths 3, 4, 5, and
A delay circuit 23 is inserted to adjust the transmission time difference between the transmission path 7 and the transmission paths 23 and 10 for the amplitude signal. The delay time of each transmission path is not always constant, and may vary depending on various factors such as a modulation signal format, a modulation index, a frequency band, each level diamond, and an ambient temperature. Since the delay circuit 23 has a delay time variable function, for example, π / 4 shift QPS
The delay time of the delay circuit 23 is adjusted by an instruction from a signal processing unit (not shown) such as when the roll-off rate of the K modulation signal changes or when the system communication band largely changes.
The optimum modulation is always performed. Therefore, the delay time setting unit 26 sets an optimum delay time at that time based on at least factors that cause a variation in transmission time difference such as an ambient temperature, a modulation signal frequency, a power supply voltage, etc. External noise can be attenuated.

【００７０】又、本発明の第６の実施形態として、遅延
部２３で遅延され平均値と加算された振幅成分を、直線
性補正部によりその直線性を補償する場合を、図面を用
いて以下に説明する。As a sixth embodiment of the present invention, a case where the linearity correction unit compensates for the linearity of the amplitude component delayed by the delay unit 23 and added to the average value will be described with reference to the drawings. Will be described.

【００７１】図６において、第６の実施形態が他の実施
形態と同一部分には同一符号が付してある。直線性補正
器２７は、式又は変換テーブルに示された関係で入力値
が応じた出力値を示すものである。直線性補正器２７で
利得可変器９の出力電力対制御電圧特性の直線性を補正
する。In FIG. 6, the same components as those of the sixth embodiment are denoted by the same reference numerals. The linearity corrector 27 indicates an output value corresponding to the input value according to the relationship shown in the equation or the conversion table. The linearity corrector 27 corrects the linearity of the output power of the gain variable device 9 versus the control voltage characteristic.

【００７２】ここで、図８に電力増幅器の出力電力対制
御電圧特性の一例を示す。この図に於いて、横軸は制御
電圧、縦軸は出力電力を示す。図中の実線が実際の電力
増幅器の出力電力制御特性である。この図から、電力増
幅器の制御電圧と出力電力との関係は、単調増加特性で
はあるものの、直線性はあまり良くないことがわかる。
そこで、変調信号の振幅成分と出力電力との関係が直線
性を示すように直線性補正器２７で補正する。図８中、
破線で示した直線のように出力電力対変調振幅特性を補
正するものとする。例えば、１［Ｗ］ の出力電力を得
ようとする場合、直線性補正器２７の入力には、０．８
２［Ｖ］を示すデジタル値が入力されるが、直線性補正
器２７の出力には、１．０７［Ｖ］を示すデジタル値が
出力される。つまり、直線性補正器２７には、図８に示
す破線の横軸入力値を実線横軸値に読み替えて出力値と
するような変換テーブルが用意されている。FIG. 8 shows an example of output power versus control voltage characteristics of the power amplifier. In this figure, the horizontal axis represents the control voltage, and the vertical axis represents the output power. The solid line in the figure is the actual output power control characteristic of the power amplifier. From this figure, it can be seen that the relationship between the control voltage and the output power of the power amplifier is monotonically increasing, but the linearity is not very good.
Therefore, the linearity corrector 27 corrects the relationship between the amplitude component of the modulation signal and the output power so that the relationship indicates linearity. In FIG.
It is assumed that the output power versus modulation amplitude characteristic is corrected as indicated by a straight line indicated by a broken line. For example, 1 [W] In order to obtain the output power of 0.8, the input of the linearity corrector 27 is 0.8
A digital value indicating 2 [V] is input, and a digital value indicating 1.07 [V] is output to the output of the linearity corrector 27. That is, the linearity corrector 27 is provided with a conversion table that reads the input value on the horizontal axis indicated by the broken line in FIG.

【００７３】あるいは、実線を近似的な数式であらわし
た変換式が与えられている。電力増幅器出力電力をＰ
Ｏ とし、制御電圧をＶcnt とすると、直線の場合は、 ＰＯ ＝Ａ×Ｖcnt ＋Ｂ なる式でＰＯ 、Ｖcnt が関係付けられる。これを例え
ば、 ＰＯ ＝Ｃ×（１−cos（Ｄ× Ｖcnt）） なる式で対応付ければ、より直線に近い出力電力変調振
幅特性を得ることができる。Alternatively, a conversion formula in which the solid line is represented by an approximate formula is given. Power amplifier output power is P
O and the control voltage is V cnt Then, in the case of a straight line, P O = A × V cnt + B, P O , V cnt Is related. This is expressed, for example, as P O = C × (1-cos (D × V cnt )) By associating with the following expression, a more linear output power modulation amplitude characteristic can be obtained.

【００７４】このようにして、たとえ利得可変器の利得
制御特性直線性が悪くても、第６実施形態に応じた直線
性補正機２７でその補正ができるので、利得可変器で合
成された最終変調波出力の変調精度をたもつことにな
る。In this way, even if the gain control characteristic of the gain variable device has poor linearity, the linearity can be corrected by the linearity corrector 27 according to the sixth embodiment. It has the modulation accuracy of the modulated wave output.

【００７５】又最後に本発明の第７の実施形態であるデ
ジタル式の直行変調機５を用いて処理を行う場合を図面
で説明する。Finally, a case where processing is performed using a digital orthogonal modulator 5 according to a seventh embodiment of the present invention will be described with reference to the drawings.

【００７６】図７は本発明の一実施形態であって、他の
実施形態と同一部分には同一符号が付してある。この実
施形態においては、デジタル直交変調器ＤＳＰ（Digita
l Signal Processor）５によって変調処理がなされる。
ベースバンド変調信号のＩ、Ｑ直交位相成分は、ＩＦロ
ーカル信号を用いて数値的に周波数変換される。その
後、デジタル直交変調器５により直交変調されたＩＦ信
号は、Ｄ／Ａ変換器３でアナログ信号へ変換された後、
周波数変換器７へ入力される。ここで更に無線周波数帯
へ周波数変換された変調位相信号は、利得可変器９で電
力増幅されるとともに、変調振幅成分が合成されて被変
調波として出力される。FIG. 7 shows an embodiment of the present invention, and the same parts as those of the other embodiments are denoted by the same reference numerals. In this embodiment, a digital quadrature modulator DSP (Digita
l Signal Processor) 5 performs modulation processing.
The I and Q quadrature phase components of the baseband modulation signal are numerically frequency-converted using the IF local signal. Thereafter, the IF signal orthogonally modulated by the digital quadrature modulator 5 is converted into an analog signal by the D / A converter 3,
Input to the frequency converter 7. Here, the modulated phase signal that has been further frequency-converted into the radio frequency band is power-amplified by the gain variable unit 9, and the modulated amplitude component is synthesized and output as a modulated wave.

【００７７】この実施形態では、ＩＦ信号へ周波数変換
したあとでＤ／Ａ変換するので、位相変調系のＤ／Ａ変
換器を一つ用意するだけでよい。又、Ｄ／Ａ変換する前
に変調処理を行うため、更に高精度の変調処理を行うこ
とができる。In this embodiment, since the D / A conversion is performed after the frequency conversion to the IF signal, it is only necessary to prepare one D / A converter of the phase modulation system. Further, since the modulation processing is performed before the D / A conversion, the modulation processing with higher precision can be performed.

【００７８】[0078]

【発明の効果】以上説明したように本発明では、位相信
号・振幅信号生成部１で変調信号の位相成分と振幅成分
とを抽出し、位相成分で位相変調をかけ周波数変換した
後に、無線周波数信号に振幅成分で増幅器の利得制御す
るようになっている。よって、振幅変動を持つ変調信号
に対しても帯域外雑音が少ない被変調信号を得ることが
できる。As described above, according to the present invention, the phase signal / amplitude signal generator 1 extracts the phase component and the amplitude component of the modulation signal, performs phase modulation with the phase component, converts the frequency component, The gain of the amplifier is controlled by the amplitude component of the signal. Therefore, a modulated signal having little out-of-band noise can be obtained even for a modulated signal having amplitude fluctuation.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１の一実施形態を示すブロック図。FIG. 1 is a block diagram showing a first embodiment of the present invention.

【図２】本発明の第２の一実施形態を示すブロック図。FIG. 2 is a block diagram showing a second embodiment of the present invention.

【図３】本発明の第３の一実施形態を示すブロック図。FIG. 3 is a block diagram showing a third embodiment of the present invention.

【図４】本発明の第４の一実施形態を示すブロック図。FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

【図５】本発明の第５の一実施形態を示すブロック図。FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

【図６】本発明の第６の一実施形態を示すブロック図。FIG. 6 is a block diagram showing a sixth embodiment of the present invention.

【図７】本発明の第７の一実施形態を示すブロック図。FIG. 7 is a block diagram showing a seventh embodiment of the present invention.

【図８】電力増幅器の出力電力対利得制御電圧特性の一
例を示す特性図。FIG. 8 is a characteristic diagram showing an example of output power versus gain control voltage characteristics of the power amplifier.

【図９】従来のこの種の変調回路の回路図。FIG. 9 is a circuit diagram of a conventional modulation circuit of this type.

【図１０】従来のこの種の変調回路の回路図。FIG. 10 is a circuit diagram of a conventional modulation circuit of this type.

【図１１】ＧＭＳＫベースバンド信号直交Ｉ、Ｑ信号の
時間波形。FIG. 11 is a time waveform of GMSK baseband signal orthogonal I and Q signals.

【図１２】ＧＭＳＫベースバンド信号の振幅、位相の時
間波形。FIG. 12 is a time waveform of amplitude and phase of a GMSK baseband signal.

【図１３】ＧＭＳＫベースバンド信号のベクトル平面表
示波形。FIG. 13 is a vector plane display waveform of a GMSK baseband signal.

【図１４】π／４ｓｈｉｆｔ ＱＰＳＫベースバンド信
号直交Ｉ、Ｑ信号の時間軸波形。FIG. 14 is a time axis waveform of π / 4 shift QPSK baseband signal orthogonal I and Q signals.

【図１５】π／４ｓｈｉｆｔ ＱＰＳＫベースバンド信
号の振幅、位相の時間軸波形。FIG. 15 is a time axis waveform of the amplitude and phase of a π / 4 shift QPSK baseband signal.

【図１６】π／４ｓｈｉｆｔ ＱＰＳＫベースバンド信
号のベクトル平面表示波形。FIG. 16 is a vector plane display waveform of a π / 4 shift QPSK baseband signal.

【図１７】本発明が削減しようとする帯域外雑音を示し
たグラフ。FIG. 17 is a graph showing out-of-band noise to be reduced by the present invention.

【符号の説明】[Explanation of symbols]

１…位相信号・振幅成分生成部、３、４、１０、２５…
Ｄ／Ａ変換器、５…（デジタル）直交変調器、６…中間
周波数シンセサイザ、７…周波数変換器、８…無線周波
数ローカルシンセサイザ、９…可変利得増幅器、１１…
バンドパスフィルタ、１２…アップコンバータミキサ、
１３…バンドバスフィルタ、１４…増幅器、１５…バン
ドパスフィルタ、２１…平均電力指示値入力端子、２２
…変調信号振幅入力端子、２３…遅延回路、２４…加算
器、５１、５２…乗算器、５３、５４…位相移相器、５
５…加算器、７１…ループフィルタ、７４、７７…ロー
パスフィルタ、７２、７５…分周器、７３…ミキサ、７
６…周波数移送比較器、７８…電圧制御発振器、８１…
位相信号生成部。1 ... Phase signal / amplitude component generator, 3, 4, 10, 25 ...
D / A converter, 5 ... (digital) quadrature modulator, 6 ... intermediate frequency synthesizer, 7 ... frequency converter, 8 ... radio frequency local synthesizer, 9 ... variable gain amplifier, 11 ...
Band-pass filter, 12 ... up-converter mixer,
13 bandpass filter, 14 amplifier, 15 bandpass filter, 21 average power indication value input terminal, 22
... modulation signal amplitude input terminal, 23 ... delay circuit, 24 ... adder, 51, 52 ... multiplier, 53, 54 ... phase phase shifter, 5
5 Adder, 71 Loop filter, 74, 77 Low-pass filter, 72, 75 Frequency divider, 73 Mixer, 7
6 frequency transfer comparator 78 voltage-controlled oscillator 81
Phase signal generator.

Claims (16)

【特許請求の範囲】[Claims] 【請求項１】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、 前記抽出手段から受けた前記振幅成分を所定時間だけ遅
延させた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。1. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, Quadrature modulation means for orthogonally modulating an analog signal received from analog conversion means and outputting an IF signal; frequency conversion means for frequency-converting the IF signal received from the quadrature modulation means and outputting an RF signal; A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the unit by a predetermined time, based on the amplitude component signal received from the delay unit,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項２】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、 前記抽出手段から受けた前記振幅成分を所定時間だけ遅
延させた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段と、 当該変調回路の出力信号の電力の平均値を求めこれに基
づいて、前記出力手段から受けた前記ＲＦ信号の電力を
増幅して前記出力信号を出力する電力増幅手段とを有す
ることを特徴とする変調回路。2. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, Quadrature modulation means for orthogonally modulating an analog signal received from analog conversion means and outputting an IF signal; frequency conversion means for frequency-converting the IF signal received from the quadrature modulation means and outputting an RF signal; A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the unit by a predetermined time, based on the amplitude component signal received from the delay unit,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means; and obtaining an average value of the power of the output signal of the modulation circuit, and based on the average value, the power of the RF signal received from the output means And a power amplifying means for amplifying the signal and outputting the output signal. 【請求項３】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、 前記抽出手段から受けた振幅成分を遅延させるべき遅延
時間を設定する遅延時間設定手段と、 前記遅延時間設定手段により設定された前記遅延時間に
応じて、前記抽出手段から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。3. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, Quadrature modulation means for orthogonally modulating an analog signal received from analog conversion means and outputting an IF signal; frequency conversion means for frequency-converting the IF signal received from the quadrature modulation means and outputting an RF signal; Delay time setting means for setting a delay time for delaying the amplitude component received from the means, and an amplitude obtained by delaying the amplitude component received from the extraction means according to the delay time set by the delay time setting means. A delay unit that outputs a component signal, based on the amplitude component signal received from the delay unit,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項４】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、 前記変調信号の信号形式と周波数帯と周辺温度との少な
くともどれか一つに基づいて、前記抽出手段から受けた
振幅成分を遅延させるべき遅延時間を設定する遅延時間
設定手段と、 前記遅延時間設定手段により設定された前記遅延時間に
応じて、前記抽出手段から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。4. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, Orthogonal modulation means for orthogonally modulating an analog signal received from analog conversion means and outputting an IF signal; frequency conversion means for frequency-converting the IF signal received from the orthogonal modulation means and outputting an RF signal; A delay time setting unit that sets a delay time for delaying the amplitude component received from the extraction unit based on at least one of a signal format, a frequency band, and an ambient temperature of the signal; and A delay unit that outputs an amplitude component signal obtained by delaying the amplitude component received from the extraction unit according to the set delay time; and the delay unit. On the basis of the amplitude component signal received al,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項５】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換手段と、 前記抽出手段から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有する変調回路において、 式又は変換テーブルを用いて前記出力手段の利得可変制
御直線性を補正すべく前記遅延手段から受けた前記振幅
成分信号を補正する補正手段を有することを特徴とする
変調回路。5. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, Quadrature modulation means for orthogonally modulating an analog signal received from analog conversion means and outputting an IF signal; frequency conversion means for frequency-converting the IF signal received from the quadrature modulation means and outputting an RF signal; Delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the means by a predetermined time; based on the amplitude component signal received from the delay means,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means, wherein the delay means for correcting the gain variable control linearity of the output means using a formula or a conversion table. A modulation circuit, comprising: a correction unit configured to correct the received amplitude component signal. 【請求項６】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をデジタル的に直
交変調してＩＦ信号を出力する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号をアナログ変
換してアナログＩＦ信号を出力するアナログ変換手段
と、 前記アナログ変換手段から受けた前記アナログＩＦ信号
を周波数変換してＲＦ信号を出力する周波数変換手段
と、 前記抽出手段から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。6. Extraction means for extracting a phase signal and an amplitude component based on a given modulation signal, and quadrature modulation means for digitally orthogonally modulating the phase signal received from the extraction means to output an IF signal. Analog conversion means for converting the IF signal received from the quadrature modulation means into an analog signal and outputting an analog IF signal; and frequency for converting the analog IF signal received from the analog conversion means and outputting an RF signal Conversion means, delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction means by a predetermined time, and based on the amplitude component signal received from the delay means,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項７】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を第１局
部発信周波数信号に基づき直交変調してＩＦ信号を出力
する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を第１フィル
タで帯域制限して第１分周器で分周し、第２局部発振周
波数信号とＲＦ信号とを乗算器で乗算し、前記乗算器出
力を第２フィルタで帯域制限して第２分周器で分周し、
更に位相比較器で前記第１分周器出力と前記第２分周器
出力との位相差を検出し、この位相差に応じた信号を第
３フィルタで平滑化することで、前記ＩＦ信号の周波数
変換を実現して前記ＲＦ信号を出力する周波数変換手段
と、 前記抽出手段から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。7. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal, A quadrature modulator for orthogonally modulating an analog signal received from an analog converter based on a first local oscillation frequency signal to output an IF signal; and a first filter for band-limiting the IF signal received from the quadrature modulator. Frequency dividing by a first frequency divider, multiplying a second local oscillation frequency signal and an RF signal by a multiplier, band-limiting the output of the multiplier by a second filter, and dividing by a second frequency divider;
Furthermore, a phase difference between the output of the first frequency divider and the output of the second frequency divider is detected by a phase comparator, and a signal corresponding to the phase difference is smoothed by a third filter, whereby the IF signal of the IF signal is detected. Frequency conversion means for realizing frequency conversion and outputting the RF signal; delay means for outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction means for a predetermined time; and the amplitude received from the delay means Based on the component signal,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項８】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出手段と、 前記抽出手段から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換手段と、 前記アナログ変換手段から受けたアナログ信号を第１局
部発信周波数信号に基づき直交変調してＩＦ信号を出力
する直交変調手段と、 前記直交変調手段から受けた前記ＩＦ信号を第１フィル
タで帯域制限し、このフィルタ出力と第２局部発振周波
数信号とを乗算器で乗算し、この乗算出力を第２フィル
タで帯域制限することにより周波数変換してＲＦ信号を
出力する周波数変換手段と、 前記抽出手段から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延手段と、 前記遅延手段から受けた前記振幅成分信号に基づいて、
前記周波数変換手段から受けた前記ＲＦ信号の振幅を可
変し出力する出力手段とを有することを特徴とする変調
回路。8. An extracting means for extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting means for converting the phase signal received from the extracting means into an analog signal and outputting an analog signal; A quadrature modulator for orthogonally modulating an analog signal received from an analog converter based on a first local oscillation frequency signal to output an IF signal; and limiting a band of the IF signal received from the quadrature modulator with a first filter; Frequency converting means for multiplying the output of the filter and the second local oscillation frequency signal by a multiplier, limiting the band of the multiplied output by a second filter, and performing frequency conversion to output an RF signal; Delay means for outputting an amplitude component signal obtained by delaying the amplitude component by a predetermined time, based on the amplitude component signal received from the delay means,
Output means for varying and outputting the amplitude of the RF signal received from the frequency conversion means. 【請求項９】与えられた変調信号に基づき位相信号と振
幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、 前記抽出工程から受けた前記振幅成分を所定時間だけ遅
延させた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。9. An extraction step of extracting a phase signal and an amplitude component based on a given modulation signal, an analog conversion step of converting the phase signal received from the extraction step into an analog signal and outputting an analog signal, A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step and outputting an IF signal; a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal; A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the step by a predetermined time, based on the amplitude component signal received from the delay step,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step. 【請求項１０】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、 前記抽出工程から受けた前記振幅成分を所定時間だけ遅
延させた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程と、 当該変調方法による出力信号の電力の平均値を求めこれ
に基づいて、前記増幅工程から受けた前記ＲＦ信号の電
力を増幅して前記出力信号を出力する電力増幅工程とを
有することを特徴とする変調方法。10. An extracting step of extracting a phase signal and an amplitude component based on a given modulated signal; an analog converting step of converting the phase signal received from the extracting step into an analog signal to output an analog signal; A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step and outputting an IF signal; a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal; A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the step by a predetermined time, based on the amplitude component signal received from the delay step,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step, and obtaining an average value of the power of the output signal by the modulation method, and based on the average value, the power of the RF signal received from the amplification step And a power amplifying step of amplifying the output signal and outputting the output signal. 【請求項１１】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、 前記抽出工程から受けた振幅成分を遅延させるべき遅延
時間を設定する遅延時間設定工程と、 前記遅延時間設定工程により設定された前記遅延時間に
応じて、前記抽出工程から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。11. An extraction step of extracting a phase signal and an amplitude component based on a given modulation signal, an analog conversion step of converting the phase signal received from the extraction step into an analog signal and outputting an analog signal; A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step and outputting an IF signal; a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal; A delay time setting step of setting a delay time to delay the amplitude component received from the step, and an amplitude obtained by delaying the amplitude component received from the extraction step according to the delay time set in the delay time setting step. A delay step of outputting a component signal, based on the amplitude component signal received from the delay step,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step. 【請求項１２】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、 前記変調信号の信号形式と周波数帯と周辺温度との少な
くともどれか一つに基づいて、前記抽出工程から受けた
振幅成分を遅延させるべき遅延時間を設定する遅延時間
設定工程と、 前記遅延時間設定工程により設定された前記遅延時間に
応じて、前記抽出工程から受けた振幅成分を遅延させた
振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。12. An extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal; A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step to output an IF signal; a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal; A delay time setting step of setting a delay time to delay the amplitude component received from the extraction step, based on at least one of a signal format, a frequency band, and an ambient temperature of the signal; and A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step according to the set delay time; Based on the amplitude signal received from,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step. 【請求項１３】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を直交変
調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を周波数変換
してＲＦ信号を出力する周波数変換工程と、 前記抽出工程から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する出力工程とを有する変調方法において、 式又は変換テーブルを用いて前記出力工程の利得可変制
御直線性を補正すべく前記遅延工程から受けた前記振幅
成分信号を補正する補正工程を有することを特徴とする
変調方法。13. An extracting step of extracting a phase signal and an amplitude component based on a given modulation signal, an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal, A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step and outputting an IF signal; a frequency conversion step of frequency-converting the IF signal received from the quadrature modulation step and outputting an RF signal; A delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the step by a predetermined time, based on the amplitude component signal received from the delay step,
An output step of varying and outputting the amplitude of the RF signal received from the frequency conversion step, wherein the delay step is performed to correct the gain variable control linearity of the output step using a formula or a conversion table. A modulation method comprising a correction step of correcting the received amplitude component signal. 【請求項１４】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をデジタル的に直
交変調してＩＦ信号を出力する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号をアナログ変
換してアナログＩＦ信号を出力するアナログ変換工程
と、 前記アナログ変換工程から受けた前記アナログＩＦ信号
を周波数変換してＲＦ信号を出力する周波数変換工程
と、 前記抽出工程から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。14. An extraction step of extracting a phase signal and an amplitude component based on a given modulation signal, and a quadrature modulation step of digitally orthogonally modulating the phase signal received from the extraction step to output an IF signal. An analog conversion step of converting the IF signal received from the quadrature modulation step into an analog signal and outputting an analog IF signal; a frequency of converting the analog IF signal received from the analog conversion step into a frequency signal and outputting an RF signal A conversion step, a delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time, and, based on the amplitude component signal received from the delay step,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step. 【請求項１５】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を第１局
部発信周波数信号に基づき直交変調してＩＦ信号を出力
する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を第１フィル
タで帯域制限して第１分周器で分周し、第２局部発振周
波数信号とＲＦ信号とを乗算器で乗算し、前記乗算器出
力を第２フィルタで帯域制限して第２分周器で分周し、
更に位相比較器で前記第１分周器出力と前記第２分周器
出力との位相差を検出し、この位相差に応じた信号を第
３フィルタで平滑化することで、前記ＩＦ信号の周波数
変換を実現して前記ＲＦ信号を出力する周波数変換工程
と、 前記抽出工程から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。15. An extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal; A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step based on a first local oscillation frequency signal to output an IF signal; and band-limiting the IF signal received from the quadrature modulation step by a first filter. Frequency dividing by a first frequency divider, multiplying a second local oscillation frequency signal and an RF signal by a multiplier, band-limiting the output of the multiplier by a second filter, and dividing by a second frequency divider;
Furthermore, a phase difference between the output of the first frequency divider and the output of the second frequency divider is detected by a phase comparator, and a signal corresponding to the phase difference is smoothed by a third filter, whereby the IF signal of the IF signal is detected. A frequency conversion step of realizing frequency conversion and outputting the RF signal; a delay step of outputting an amplitude component signal obtained by delaying the amplitude component received from the extraction step by a predetermined time; and the amplitude received from the delay step Based on the component signal,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step. 【請求項１６】与えられた変調信号に基づき位相信号と
振幅成分とを抽出する抽出工程と、 前記抽出工程から受けた前記位相信号をアナログ変換し
てアナログ信号を出力するアナログ変換工程と、 前記アナログ変換工程から受けたアナログ信号を第１局
部発信周波数信号に基づき直交変調してＩＦ信号を出力
する直交変調工程と、 前記直交変調工程から受けた前記ＩＦ信号を第１フィル
タで帯域制限し、このフィルタ出力と第２局部発振周波
数信号とを乗算器で乗算し、この乗算出力を第２フィル
タで帯域制限することにより周波数変換してＲＦ信号を
出力する周波数変換工程と、 前記抽出工程から受けた振幅成分を所定時間だけ遅延さ
せた振幅成分信号を出力する遅延工程と、 前記遅延工程から受けた前記振幅成分信号に基づいて、
前記周波数変換工程から受けた前記ＲＦ信号の振幅を可
変し出力する増幅工程とを有することを特徴とする変調
方法。16. An extracting step of extracting a phase signal and an amplitude component based on a given modulated signal, an analog converting step of converting the phase signal received from the extracting step into an analog signal and outputting an analog signal; A quadrature modulation step of orthogonally modulating an analog signal received from the analog conversion step based on a first local oscillation frequency signal to output an IF signal; and band-limiting the IF signal received from the quadrature modulation step with a first filter; A frequency conversion step of multiplying the filter output by a second local oscillation frequency signal by a multiplier, limiting the band of the multiplied output by a second filter, and outputting an RF signal; A delay step of outputting an amplitude component signal obtained by delaying the amplitude component by a predetermined time, based on the amplitude component signal received from the delay step,
An amplification step of varying and outputting the amplitude of the RF signal received from the frequency conversion step.
JP11091717A 1999-03-31 1999-03-31 Signal modulation circuit and method Pending JP2000286915A (en)

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PCT/JP2000/002124 WO2000059172A1 (en) 1999-03-31 2000-03-31 Signal modulation circuit and method for signal modulation
US09/964,758 US6914943B2 (en) 1999-03-31 2001-09-28 Signal modulation circuit and signal modulation method

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